<!-- 分类参数 -->
<template>
  <div>
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>分类参数</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <!-- 警告区域 -->
      <el-alert
        title="注意：只允许为第三级分类设置相关参数！"
        type="warning"
        :closable="false"
        show-icon
      >
      </el-alert>
      <!-- 商品分类区域 -->
      <el-row class="cat_opt">
        <el-col>
          <span>选择商品分类：</span>
          <el-cascader
            v-model="selectedCateKeys"
            :options="cataList"
            :props="cateProps"
            @change="selectedCateChange"
          ></el-cascader>
        </el-col>
      </el-row>
      <!-- Tabs标签页区域 -->
      <el-tabs v-model="activeName" @tab-click="handleTabClick">
        <!-- 添加动态参数的面板 -->
        <el-tab-pane label="动态参数" name="many">
          <!-- 添加参数的按钮 -->
          <el-button
            type="primary"
            size="mini"
            :disabled="isBtnDisabled"
            @click="addDialogVisible = true"
            >添加参数</el-button
          >
          <!-- 动态参数表格 -->
          <el-table :data="manyTableData" border stripe>
            <el-table-column type="expand">
              <template slot-scope="scope">
                {{ scope.index }}
                <el-tag
                  v-for="(item, i) in scope.row.attr_vals"
                  :key="i"
                  closable
                  @close="handleClose(i,scope.row)"
                >
                  {{ item }}
                </el-tag>
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  :ref="'row' + scope.$index + '.saveTagInput'"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                >
                </el-input>
                <el-button
                  v-else
                  class="button-new-tag"
                  size="small"
                  @click="showInput(scope)"
                  >+ New Tag</el-button
                >
              </template>
            </el-table-column>
            <el-table-column type="index"></el-table-column>
            <el-table-column
              label="参数名称"
              prop="attr_name"
            ></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button
                  type="primary"
                  icon="el-icon-edit"
                  size="mini"
                  @click="showEditDialog(scope.row.attr_id)"
                  >编辑</el-button
                >
                <el-button
                  type="danger"
                  icon="el-icon-delete"
                  size="mini"
                  @click="removeParams(scope.row.attr_id)"
                  >删除</el-button
                >
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
        <!-- 添加静态属性的面板 -->
        <el-tab-pane label="静态属性" name="only">
          <!-- 添加属性的按钮 -->
          <el-button
            type="primary"
            size="mini"
            :disabled="isBtnDisabled"
            @click="addDialogVisible = true"
            >添加属性</el-button
          >
          <!-- 静态属性表格 -->
          <el-table :data="onlyTableData" border stripe >
            <el-table-column type="expand">
              <template slot-scope="scope">
                {{ scope.index }}
                <el-tag
                  v-for="(item, i) in scope.row.attr_vals"
                  :key="i"
                  closable
                  @close="handleClose(i,scope.row)"
                >
                  {{ item }}
                </el-tag>
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  :ref="'row' + scope.$index + '.saveTagInput'"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                >
                </el-input>
                <el-button
                  v-else
                  class="button-new-tag"
                  size="small"
                  @click="showInput(scope)"
                  >+ New Tag</el-button
                >
              </template>
            </el-table-column>
            <el-table-column type="index"></el-table-column>
            <el-table-column
              label="属性名称"
              prop="attr_name"
            ></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button
                  type="primary"
                  icon="el-icon-edit"
                  size="mini"
                  @click="showEditDialog(scope.row.attr_id)"
                  >编辑</el-button
                >
                <el-button
                  type="danger"
                  icon="el-icon-delete"
                  size="mini"
                  @click="removeParams(scope.row.attr_id)"
                  >删除</el-button
                >
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
      </el-tabs>
    </el-card>
    <!-- 添加参数或添加属性的对话框 -->
    <el-dialog
      :title="'添加' + titleText"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogClose"
    >
      <!-- 添加参数或添加属性的表单 -->

      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
      >
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="addForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addParams">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 修改参数或添加属性的对话框 -->
    <el-dialog
      :title="'修改' + titleText"
      :visible.sync="editDialogVisible"
      width="50%"
      @close="editDialogClose"
    >
      <!-- 添加参数或添加属性的表单 -->

      <el-form
        :model="editForm"
        :rules="editFormRules"
        ref="editFormRef"
        label-width="100px"
      >
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="editForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editParams">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      //商品分类列表
      cataList: [],
      //商品分类级联选择器配置项
      cateProps: {
        value: "cat_id",
        label: "cat_name",
        children: "children",
        expandTrigger: "hover",
      },
      //选中商品分类的id
      selectedCateKeys: [],
      // 被激活的页签名称
      activeName: "many",
      //动态参数列表
      manyTableData: [],
      //静态属性列表
      onlyTableData: [],
      //添加参数或属性对话框的显示与隐藏
      addDialogVisible: false,
      //添加参数的表单数据对象
      addForm: {
        attr_name: "",
      },
      //添加表单的验证规则对象
      addFormRules: {
        attr_name: [
          { required: true, message: "请输入参数名称", trigger: "blur" },
        ],
      },
      //修改参数或属性对话框的显示与隐藏
      editDialogVisible: false,
      //修改参数的表单数据对象
      editForm: {},
      //修改表单的验证规则对象
      editFormRules: {
        attr_name: [
          { required: true, message: "请输入参数名称", trigger: "blur" },
        ],
      },
    };
  },

  computed: {
    isBtnDisabled() {
      if (this.selectedCateKeys.length === 3) return false;
      else return true;
    },
    //选中商品分类三级id
    cateId() {
      if (this.selectedCateKeys.length === 3) {
        return this.selectedCateKeys[2];
      } else {
        return null;
      }
    },
    //动态计算标题的文本
    titleText() {
      if (this.activeName == "many") return "动态参数";
      else return "静态属性";
    },
  },

  created() {
    this.getCateList();
  },

  methods: {
    //获取所有的商品分类列表
    async getCateList() {
      const { data: res } = await this.$http.get("categories");
      if (res.meta.status == 200) {
        this.cataList = res.data;
      } else {
        this.$message.error("获取商品分类列表失败！");
      }
    },
    //选中的商品分类变化时执行
    selectedCateChange() {
      if (this.selectedCateKeys.length !== 3) {
        this.selectedCateKeys = [];
        //选中的不是三级分类时，清空动态参数、静态属性表格
        this.manyTableData=[];
        this.onlyTableData=[]
      } else {
        this.getCateParams();
      }
    },
    //Tab页签点击事件的处理函数
    handleTabClick() {
      if (this.selectedCateKeys.length > 0) {
        this.getCateParams();
      }
    },
    //获取分类参数
    async getCateParams() {
      const { data: res } = await this.$http.get(
        `categories/${this.cateId}/attributes`,
        { params: { sel: this.activeName } }
      );
      if (res.meta.status != 200) {
        this.$message.error("获取分类参数失败！");
      } else {
        res.data.forEach((item) => {
          item.attr_vals = item.attr_vals ? item.attr_vals.split(" ") : [];
          //控制输入框的显示与隐藏
          item.inputVisible = false;
          //文本框中输入的值
          item.inputValue = "";
        });
        if (this.activeName == "many") this.manyTableData = res.data;
        else this.onlyTableData = res.data;
      }
    },
    //对话框关闭时，清空表单数据和校验
    addDialogClose() {
      this.$refs.addFormRef.resetFields();
    },
    //添加参数
    addParams() {
      this.$refs.addFormRef.validate(async (valid) => {
        const { data: res } = await this.$http.post(
          `categories/${this.cateId}/attributes`,
          { attr_name: this.addForm.attr_name, attr_sel: this.activeName }
        );
        if (res.meta.status == "201") {
          this.$message.success(res.meta.msg);
          this.addDialogVisible = false;
          this.getCateParams();
        } else {
          this.$message.error(res.meta.msg);
        }
      });
    },
    async showEditDialog(attr_id) {
      this.editDialogVisible = true;
      //查看当前参数的信息
      const { data: res } = await this.$http.get(
        `categories/${this.cateId}/attributes/${attr_id}`,
        { params: { attr_sel: this.activeName } }
      );
      if (res.meta.status == "200") {
        this.editForm = res.data;
      } else {
        this.$message.error(res.meta.msg);
      }
    },
    //关闭修改对话框时，清空表数据和校验
    editDialogClose() {
      this.$refs.editFormRef.resetFields();
    },
    //修改参数
    editParams() {
      this.$refs.editFormRef.validate(async (valid) => {
        if (valid) {
          const { data: res } = await this.$http.put(
            `categories/${this.cateId}/attributes/${this.editForm.attr_id}`,
            {
              attr_name: this.editForm.attr_name,
              attr_sel: this.activeName,
            }
          );
          if (res.meta.status == 200) {
            this.$message.success(res.meta.msg);
            this.getCateParams();
            this.editDialogVisible = false;
          } else {
            this.$message.error(res.meta.msg);
          }
        }
      });
    },
    //根据Id删除对应的参数项
    removeParams(attr_id) {
      this.$confirm("此操作将永久删除该参数, 是否继续?", "提示", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning",
      })
        .then(async () => {
          const { data: res } = await this.$http.delete(
            `categories/${this.cateId}/attributes/${attr_id}`
          );
          console.log(res);
          if (res.meta.status == 200) {
            this.$message.success(res.meta.msg);
            this.getCateParams();
          } else {
            this.$message.error(res.meta.msg);
          }
        })
        .catch(() => {
          this.$message({
            type: "info",
            message: "已取消删除",
          });
        });
    },
    //对话框失焦或者点击回车时触发
    handleInputConfirm(row) {
      console.log(row)
      if (row.inputValue) {
        row.attr_vals.push(row.inputValue);
        this.editTag(row)
      }
      row.inputValue = "";
      row.inputVisible = false;
    },
    async editTag(row){
      const { data: res } = await this.$http.put(
        `categories/${this.cateId}/attributes/${row.attr_id}`,
        {
          attr_name: row.attr_name,
          attr_sel: row.attr_sel,
          attr_vals: row.attr_vals.join(' '),
        }
      );
      if (res.meta.status == 200) {
        this.$message.success(res.meta.msg);
      } else {
        this.$message.error(res.meta.msg);
      }
    },
    //点击+Tag按钮
    showInput(scope) {
      scope.row.inputVisible = true;
      // $nextTick方法的作用是：页面上的元素被重新渲染之后，才会执行回调函数中的代码
      this.$nextTick((_) => {
        console.log(this);
        this.$refs["row" + scope.$index + ".saveTagInput"].$refs.input.focus();
      });
    },
    //关闭tag
    handleClose(i,row){
      row.attr_vals.splice(i,1);
      this.editTag(row)
    }
  },
};
</script>
<style lang='less' scoped>
.cat_opt {
  margin: 15px 0;
}
.el-tag {
  margin: 10px;
}
.el-tag + .el-tag {
  margin-left: 10px;
}
.button-new-tag {
  margin-left: 10px;
  height: 32px;
  line-height: 30px;
  padding-top: 0;
  padding-bottom: 0;
}
.input-new-tag {
  width: 90px;
  margin-left: 10px;
}
</style>